}
        return deferred.promise();
    }

    /**
     * Processes the request.
     * @param client The OpenSearch client.
     * @param deferred The Deferred object to resolve or reject the response.
     */
    protected abstract void processRequest(Client client, Deferred<T> deferred);

    /**
     * Returns a validation error message, or null if there are no errors.

     * @param className
     *            The binary name of the class. Must not be {@literal null} or an empty string.
     * @return The resulting <code>Class</code> object.
     * @throws ClassNotFoundRuntimeException
     *             If the class could not be found.
     * @see java.lang.ClassLoader#loadClass(String)
     */

    }

    @Override
    public AccessTokenDbm asDBMeta() {
        return AccessTokenDbm.getInstance();
    }

    @Override
    protected <RESULT extends AccessToken> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

    @Override
    public ElevateWordToLabelDbm asDBMeta() {
        return ElevateWordToLabelDbm.getInstance();
    }

    @Override
    protected <RESULT extends ElevateWordToLabel> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setElevateWordId(DfTypeUtil.toString(source.get("elevateWordId")));

    }

    @Override
    public KeyMatchDbm asDBMeta() {
        return KeyMatchDbm.getInstance();
    }

    @Override
    protected <RESULT extends KeyMatch> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setBoost(DfTypeUtil.toFloat(source.get("boost")));

    }

    @Override
    public RelatedContentDbm asDBMeta() {
        return RelatedContentDbm.getInstance();
    }

    @Override
    protected <RESULT extends RelatedContent> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setContent(DfTypeUtil.toString(source.get("content")));

    }

    @Override
    public RelatedQueryDbm asDBMeta() {
        return RelatedQueryDbm.getInstance();
    }

    @Override
    protected <RESULT extends RelatedQuery> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedBy(DfTypeUtil.toString(source.get("createdBy")));

   * TODO: make this inline once this is fixed: https://github.com/oracle/graal/issues/3466
   */
  fun schedule(
    name: String,
    delayNanos: Long = 0L,
    block: () -> Long,
  ) {
    schedule(
      object : Task(name) {
        override fun runOnce(): Long = block()
      },
      delayNanos,
    )
  }

  /**
   * Executes [block] once on a task runner thread.
   *

    }

    @Override
    public FavoriteLogDbm asDBMeta() {
        return FavoriteLogDbm.getInstance();
    }

    @Override
    protected <RESULT extends FavoriteLog> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setCreatedAt(toLocalDateTime(source.get("createdAt")));

        return "group";
    }

    @Override
    public GroupDbm asDBMeta() {
        return GroupDbm.getInstance();
    }

    @Override
    protected <RESULT extends Group> RESULT createEntity(Map<String, Object> source, Class<? extends RESULT> entityType) {
        try {
            final RESULT result = entityType.newInstance();
            result.setGidNumber(DfTypeUtil.toLong(source.get("gidNumber")));